Street lighting luminaire



Aug. 31, 1965 E. R. JABLONSKI STREET LIGHTING LUMINAIRE 2. Sheets-Sheet1 Filed Jan. 28, 1963 Aug. 31, 1965 E. R. JABLONSKI STREET LIGHTINGLUMINAIRE 2 Sheets-Sheet 2 Filed Jan. 28, 1963 INVENTOR. Edward A.Jablazzsfid BY nu!.inllnlnlltlllilfllltll United States Patent 3,204,092STREET LIGHTING LUMINAIRE Edward R. Jahlonski, South Milwaukee, Wis.,assignor to McGraw-Edison Company, Milwaukee, Wis., 21 "corporation ofDelaware Filed Jan. 28, 1963, Ser. No. 254,071 11 Claims. (Cl. 24025)This invention relates to luminaires and more particularly to certainstructural features of a horizontal mercury type luminaire havingparticular application for street lighting.

Prior art horizontal mercury luminaires generally include an inverteddished ovate housing, an inverted dished ovate reflector disposedbeneath the housing and a dished refractor carried by a bottom housingclosure member and pivotally mounted for movement into and out ofsealing engagement with the lower periphery of either the refractor orthe housing.

Such horizontal mercury luminaires are generally mounted on a verticalsupport pole so that complicated and expensive servicing techniques andequipment is required. As a result, even a relatively small time savingsin the servicing of each luminaire can result in a substantial costsaving when a large number of such luminaires are being serviced.Accordingly, such luminaires are provided with a quick release latch forreleasing the bottom closure member for pivotal movement away from thehousing, and quick release fastening means provided for holding therefractor in the bottom closure member and for holding the reflectorWithin the housing.

It is an object of the invention to provide new and improved quickrelease devices for the reflector and refractor of a horizontal mercuryluminaire.

Another object of the invention is to provide a quick release latch forholding the bottom closure member of a horizontal mercury luminairewherein positive spring pressure is applied when the latch is in itsclosed position.

A further object of the invention is to provide a quick release springlatch for holding the reflector of horizontal mercury luminaires withinits housing and which applies positive spring pressure to maintain theseal of the peripheries of the reflector and its cooperating refractor.

Yet aother object of the instant invention is to provide quick releasemember for holding the refractor of a horizontal mercury luminairewithin a pivotal housing bottom closure member and which require notools for release and wherein their removal from the luminaire is notrequired.

. It is another object of the invention to provide a luminaire havingresilient spring latch means for supporting a reflector in spacedrelation from the housing and for biasing the same outwardly of itsoperative position to correct for misalignment With its cooperatingrefractor.

These and other objects and advantages of the instant invention willbecome more apparent from the detailed description thereof taken withthe accompanying drawings, in which:

FIG. 1 is a side elevational view with parts broken away showing aluminaire incorporating the instant invention;

FIG. 2 is a view taken along lines 22 of FIG. 1;

FIG. 3 is a view taken along lines 33 of FIG. 1;

I FIG. 4 is a view taken along lines 44 of FIG. 1; FIG. 5 is a viewtaken along lines 5--5 of FIG. 1; FIG. 6 is a View of a portion of therefractor quick re lease means in its unlatched position;

FIG. 7 is a view taken along lines 66 of FIG. 1; and

FIG. 8 shows the quick release latch according to the instant inventionin its unlatched position.

Referring now to the drawings in greater detail, FIG. 1 shows ahorizontal mercury luminaire 10 which includes a generally invertedovate housing 11 having an elongate portion 12 integrally formed on oneside thereof for enclosing a slipfitter assembly (not shown) whichpermits attachment of the luminaire 10 to a horizontally extending pipesupport member (not shown).

An ovate reflector 13 is mounted within the housing 11 for reflectinglight rays in a generally downward direction as viewed in FIG. 1whereupon they are further modified by a cooperating refractor 16. Therefractor 16 is mounted on a bottom closure member 18 which is supportedat one end beneath the slipfitter housing 12 by a hinge assembly 19 topermit pivotal movement in a clockwise direction as viewed in FIG. 1 sothat the underside of the housing may be exposed for relamping, theremoval of the reflector 13 from the housing 11, the removal of therefractor 16 from the bottom closure member 18 and other maintenancepurposes. A quick release latch assembly 20 is provided at the oppositeside of the closure member 18 so that the latter may be aflixed in itsclosed position shown in FIG. 1 whereby a peripheral flange 22 on therefractor 16 is held in cooperating sealed engagement with a gasket 23carried by a peripheral flange 21 on the reflector 13.

As seen in FIG. 1, the end of the reflector 13 opposite the latch 20 isprovided with an aperture 24 for receiving therethrough a light socket26 which supports a lamp (not shown) within the optical assemblyconsisting of the reflector 13 and the refractor 16. The light socket 26is suitably supported within the housing 11 by a bracket assembly 25 andis connected to a source of energy (not shown) in a manner well known inthe art. A suitable gasket 27 of flexible material such as rubber isaflixed to the reflector 13 around the aperture 24 and cooperativelyengages the surface of the light socket 26 to seal the aperture 24. Thegasket 27 is sulflciently flexible to allow a substantial amount ofrelative movement between the reflector 13 and the lamp socket 26 whilemaintaining the seal therebetween. In order to help position thereflector 13 within the housing 11 an arm 28 depends from the bracketassembly 25 for abutment by the gasket 27. In addition, a small indexingslot 30 is formed in the reflector 13 above the aperture 24 forreceiving a tongue 31 extending from the arm 28 and through a slot 32 inthe gasket 27.

From the foregoing it will be appreciated that one end of the reflector13 is supported by the light socket 26. The other end of the reflector13 is resiliently supported by a quick release latch assembly 33consisting of a latch spring 34 and a catch plate 35.

As seen in FIGS. 1 and 2, the latch spring 34 is shown to have agenerally S-shaped configuration with one end attached to the reflector13 by rivets 36 and at a point substantially opposite the aperture 24.With reference to FIGS. 1 and 3 the catch plate 35 is mounted within thehousing 11 and adjacent the latch 20 in any suitable manner, such as byscrews 38, and has a rearwardly extending ear 39 which is steppedupwardly therefrom. The catch plate 35 also has a slot 40 formed at theedge of the ear 39.

The free end of the spring 34 is provided with notches at either side toform a latch tip 41 for cooperatively engaging the slot 40 in the catchplate 35. The tendency of the free end of the spring 34 is to curldownwardly as shown in FIG. 2 so that when it is in the slot 40 it isslightly deformed by the ear 39 whereby the adjacent end of thereflector 13 is biased toward slight outward movement relative to thehousing 11.

It can be seen that the lamp socket 26 and the latch assembly supportthe reflector 13 in spaced relation from the housing 11. As a result,when the closure member 18 is brought into its closed position, theperipheral flange 21 on the reflector 13 and the coacting refractorflange 22 will engage and the reflector will be moved slightly inwardlyof the housing to its operative position shown in FIG. 1 and against thebiasing force of the latch spring 34. This movement automaticallycorrects any misalignment between the reflector 13 and the refractor 16.

In addition, this outward biasing force of the spring 34- acts to holdthe peripheral flanges 21 and 22 of the reflector 13 and the refractor16 in tight sealing engagement and to compress the gasket 23 disposedtherebe tween. Thus, the spring 34 not only acts as a quick release forthe reflector 13 but also acts to provide sealing contact pressurebetween the reflector 13 and the refractor 16 and allows the correctionof misalignment therebetween.

When the bottom closure 18 is open and it is desired to remove thereflector 13 from the housing 11 the free end of the spring 24 is movedrearwardly and out of the slot 40. The aperture 24 of the reflector isthen slid forwardly on the light socket 26 for a short distance untilthe slot 31 is moved away from the tongue 30. Continued forward movementof the reflector 13 disengages the gasket 27 and the aperture 24 fromthe socket 26 thereby freeing the reflector 13 from the housing 11.

As seen in FIGS, 1, 4, 5, and 6, the upper peripheral edge 22 of therefractor 16 engages a correspondingly shaped aperture 44 in the bottomclosure member 18. The refractor 16 is held in the aperture 44 by a barclip 46 and a quick release latch assembly 47. The bar clip 46 has anelongate flat configuration and is secured to the inner surface of theclosure member 18 adjacent the latch 29 by means of screws 48 with oneof its lateral edges overlaying a small portion of the refractor flange22. The quick release latch assembly 47 is disposed at the opposite sideof the refractor 16 and includes a flat bar 50 affixed to the closure 18adjacent the aperture 44 by means of a screw 51. As seen particularly inFIG. 5, the bar 50 is maintained in an elevated position by lugs 53projecting integrally from the closure member 18. An elongate wire lockspring 55 is disposed beneath the plate 51) and generally between thelugs 53. More specifically, the spring 51 has an inverted U-shapedfinger engaging portion 56 which extends generally upwardly adjacent therear edge of the plate 50 and is in substantial engagement therewithwhen the spring member 55 is in a locking position relative to therefractor 16. As seen in FIG. 4, the lock spring 55 has a pair of legs58 which extend forwardly from the lower ends of the finger engagingportion 56 to a point adjacent the lugs 53 whereupon each of the legsflare outwardly and then rearwardly in a generally J-shaped portionwhich embracingly engages the flange 2,2 of the refractor 16. Each ofthe legs 58 terminates in a downwardly projecting tip, as seen in FIG.1, which engages the outer rim of the flange 22.

When the lock spring 55 is in its position shown in FIG. 4, therefractor 16 will be held in the aperture 44 by the legs 58 as well asthe bar 46 disposed in the opposite end of the aperture 454. The legs 58of the lock spring 55 bear sligthly outwardly against the lugs 53 andthis along with the outwardly flared portion thereof tends to preventaccidental movement of the latch spring out of its refractor engagingposition.

In order to remove the refractor after the bottom closure member 18 hasbeen opened the spring 55 is moved rearwardly as viewed in FIGS. 1 and 2by engaging the porttion 56. This moves the spring 55 to its positionshown in FIG. 6 wherein the ends of the legs are out of engagement withthe refractor flange 22 and wherein their outwardly projecting portionsare forced inwardly by the lugs 53. The tendency of the legs 58 to moveoutwardly and to assume their normal position forces the legs 58 intofrictional engagement with the lugs 53 thereby tending to hold thespring 55 is in' its position shown in FIG. 6. By merely tilting therear end of the refractor 21 away from the adjacent portion of thebottom closure member 18 the opposite end of the refractor may then beremoved from beneath the plate 46.

Thus, without the use of tools, and by means of a simple operation therefractor 16 may be readily removed from the bottom closure member 18.It will be apparent too that the refractor 16 may be re-inserted withrelative ease by a reversal of the above-described procedure.

Referring now to FIGS. 1, 7 and 8 the front closure latch can be seen toinclude a latch member 60 and a latch spring 62. The latch spring 62comprises an elongate loop having an appended generally lazy-U sidewiseconfiguration with its lower end sloping downwardly and away from thecentral portion to terminate a pair of inwardly directed end portions 63which are loosely received for pivotal movement in apertures 64 formedin a pair of adjacent lug portions 64 integral with the free end of thebottom closure member 18. The other end of the spring 62 slopes upwardlyand away from the central portion for engagement by the latch member 60.

The latch member 60 includes a handle portion 68 and a cam portion 69.The cam portion 69 has a cam surface 70 formed along one side thereoffor cooperative engagement with an oppositely formed surface 72 on thehousing 11 when the latch is in its closed position shown in FIG. 1. Inaddition, a convex catch surface 73 is formed on the other side of thecam portion 69 for cooperative engagement with an elevated catch 75formed on the housing 11 and outwardly of the surface 70.

When the bottom closure member 18 is to be latched it is pivotedcounterclockwise as viewed in FIG. 1 until it is in a substantiallyclosed position. The latch spring 62 is then pivoted counterclockwise asviewed in FIG. 7 until the catch surface 73 on the opposite side of thecam member 69 is brought into engagement with the catch 75 on thehousing 11. This engagement holds the closure member 18 in the positionshown in FIG. 8 and prevents rotation thereof away from the housing 11.Latch member 60 is then rotated counterclockwise so that the cam surface70 is made to roll along the surface 72 on the housing 11 causingflexure of the spring 62 so that the bottom closure member 18 is biasedtoward a closed position and the refractor flange 22 is brought into acompressive sealing engagement with the reflector flan e 21. Inaddition, this moves the reflector 13 upwaid slightly against the latchspring 34 so that this spring will also urge sealing engagement betweenthe flanges 21 and 22 of the reflector 13 and the refractor 16respectively.

It can be seen that as the surface 70 begins moving off the catch 75 andonto the surface 72 of the housing 11, the latch member 60 will moveinto and over center positron relative to the spring 62 and it will thensnap into its latched position shown in PEG. 1. This overcenter actronalso serves to prevent movement of the cam portron 68 up the catch 75 sothat the latch member 60 is resiliently held in its latched positionshown in FIG. 1.

It can thus be seen that the latch mechanism 20 not only serves to holdthe bottom closure member in closed position relative to the housing 11but it also provides positive spring pressure for this purpose. Inaddition, the latch spring 62 in cooperation with the latch spring 34tends to maintain a positive sealing pressure between the refractor 16and the reflector 13 when the assembly is in its latched position.

It can also be seen with respect to FIG. 8 that the spring 34 holds thereflector 13 sufficiently outwardly of the housing 11 so that when thebottom closure member 18 is moved to its position in FIG. 8 therefractor flange 22 will just engage the reflector flange 21. Further,move ment of the closure member to its fully closed position will flexspring 34 so that it will exert sealing pressure, between the flanges 21and 22.

While only a single embodiment of the invention has been disclosed andwhile the invention has been illustrated with respect to a particularluminaire, it will be appreciated by those skilled in the art that theinvention may take other forms and be applicable to other types ofluminaires as well. Accordingly, it is intended that the invention onlybe limited by the scope of the appended claims.

I claim:

1. A luminaire comprising an inverted dished housing having a bottomopening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening, anaperture in one end of said reflector and slidably engaging said lampholding means, resilient spring latch means for releasably supportingthe other end of said reflector in said housing, said resilient springlatch means and said lamp holding means supporting said reflector inspaced relation from said housing, said spring latch means alsoresiliently biasing said reflector toward limited movement outwardly ofsaid housing, a peripheral flange around said bottom opening of saidreflector, a closure assembly hingedly mounted on said housing,releasable latch means for securing said closure member to said housingin a closed position, and a refractor having a peripheral flange mountedin said closure assembly with said refractor flange engaging saidreflector flange when said closure assembly is in its closed position,said engagement moving said reflector inwardly of said housing andagainst the biasing force of said spring latch means so that saidflanges are urged into sealing engagement and misalignment between saidrefractor and said reflector is corrected.

2. A luminaire comprising an inverted dished housing having a bottomopening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening, anaperture in one end of said reflector and slidably engaging said lampholding means, a catch mounted on one of said housing and said reflectoropposite said lamp holding means, resilient spring latch means securedto the other of said housing and said reflector and engageable with saidcatch, said spring latch supporting said reflector in spaced relationfrom said housing and biasing said reflector outwardly of said housing,a peripheral flange around said bottom opening of said reflector, aclosure assembly hingedly mounted on said housing, a releasable latchmeans for securing said closure member to said housing in a closedposition, and a refractor having a peripheral flange mounted in saidclosure assembly with said refractor flange engaging said reflectorflange when said closure assembly is in its closed position, saidengagement moving said reflector inwardly of said housing and againstthe biasing force of said latch spring so that said flanges are urgedinto sealing engagement.

3. A luminaire comprising an inverted dished housing having a bottomOpening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening andbeing mounted substantially within said housing, a peripheral flangearound said bottom opening of said reflector, an aperture in one end ofsaid reflector and slidably engaging said lamp holding means, quickrelease latch means opposite said lamp holding means and including acatch mounted on one of said housing and said reflector and an elongateresilient spring latch secured to the other of said housing and saidreflector and having an upwardly extending portion terminating in alatch tip for engaging said catch, the engagement between said latch tipand said catch causing deformation of said spring to bias said reflectorfor limited movement outwardly of said housing, said latch means andsaid lamp holding means supporting said reflector in spaced relationfrom said housing, a closure assembly hingedly mounted to said housing,a releasable latch means for securing said closure assembly to saidhousing in a closed position, and a refractor having a peripheral flangemounted in said closure assembly with said refractor flange engagingsaid reflector flange when said closure assembly is in its closedposition, said engagement moving said reflector inwardly of said housingand against the biasing force of said latch spring so that said flangesare urged into sealing engagement and misalignment between saidreflector and said refractor is corrected.

4. A luminaire comprising an inverted dished housing with a bottomopening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening, anaperture in said reflector, said lamp holding means being slidablyreceivable within said aperture to support one side of said reflector,resilient spring latch means for releasably securing the other end ofsaid reflector within said housing and in spaced relation therefrom andfor biasing said reflector for limited movement outwardly of saidhousing, a gasketed peripheral flange around said bottom opening of saidreflector, a closure assembly hingedly mounted to said housing, arefractor having a perihperal flange mounted in said closure assembly,releasable latch means for securing said closure assembly to saidhousing in a closed position with said refractor flange engaging saidgasketed reflector flange, said releasable latch means including holdingspring means for resiliently urging said closure assembly toward itsclosed position in opposition to the biasing force of said resilientspring latch means so that said reflector flange and said refractorflange are biased into sealing engagement by said spring latch means andholding spring means.

5. A luminaire comprising an inveited dished housing having a bottomopening, an inverted dished reflector having a bottom opening and beingmounted at least partially within said housing, an aperture in saidreflector, lamp holding means extending through said aperture forsupporting a light source and for supporting one end of said reflector,a catch secured to one of said housings and said reflector generallyopposite said lamp holding means, resilient means on the other of saidhousing and said reflector and resiliently engaging said catch tosupport said reflector in spaced relation from said housing and to biassaid reflector toward limited movement outwardly of the bottom openingof said housing, a peripheral flange around said bottom opening of saidreflector, a closure assembly hingedly mounted to said housing, arefractor having a peripheral flange mounted in said closure assembly,releasable latch means for se curing said closure assembly to saidhousing in a closed position, with said reflector flange engaging saidrefractor flange, releasable latch means including urging spring meansfor resiliently holding said closure as sembly toward a closed positionand for holding said reflector inwardly of said housing in opposition tothe biasing force of said resilient means so that said reflector flangeand said refractor flange are biased into sealing engagement by saidresilient means and said holding spring means.

6. A luminaire comprising an inverted dished housing having a bottomopening, an inverted dished reflector having a bottom opening and beingmounted at least partially within said housing, an aperture in saidreflector, lamp holding means extending through said aperture forsupporting a light source and for supporting one end of said reflector,elongate resilient latch spring means secured to said reflectorgenerally opposite said lamp holding means and having a shaped latchtip, catch means on said housing and having latch receiving means shapeddifferently than said latch tip, engagement between said latch tip andsaid catch supporting said reflector in spaced relation from saidhousing, said engagernent also biasing said reflector toward limitedmovement outwardly of the bottom opening of said housing, a gasketedperipheral flange around the bottom opening of said reflector, a closureassembly hingedly mounted 7 to said housing, a refractor having aperipheral flange mounted in said closure assembly, releasable latchmeans for securing said closure assembly to said housing in a closedposition with said gasketed reflector flange engaging said refractorflange, said releasable latch means including holding spring means forresiliently urging said closure assembly toward closed position and forholding said reflector inwardly of said housing in opposition to thebiasing force of said latch spring means so that said reflector flangeand said refractor flange are biased into sealing engagement by saidlatch spring means and said holding spring means.

'7. A luminaire comprising an inverted dished housing having a bottomopening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening, anaperture in one end of said reflector and slidably engaging said lampholding means, a catch mounted on one of said housing and said reflectoropposite said lamp holding means, resilient spring latch means securedto the other of said housing and said reflector and opposite saidaperture and resiliently engaging said catch to support the other end ofsaid reflector in spaced relation from said housing and to bias the sametoward limited movement outwardly of said housing, a gasketed peripheralflange around the bottom opening of said reflector, a closure assemblyhingedly mounted to said housing, a releasable latch means for securingsaid closure assembly to said housing in a closed position, said latchmeans including elongate spring means pivotally connected to one of saidhousing and said closure assembly, a latch member pivotally mounted tothe free end of said elongate spring means, a cam surface formed on saidlatch member, a catch formed on the other of said housing and closureassembly for cooperating with said cam surface, rotation of said camsurface over said catch being operative to bring said bottom closureassembly into a closed position relative to said housing and to flexsaid elongate spring means so that said bottom closure assembly isbiased toward closed position relative to said housing, the refractorhaving a peripheral flange mounted in said closure assembly, saidrefractor flange engaging said gasketed reflector flange when theclosure assembly is in a closed position.

8. A luminaire comprising an inverted dished housing having a bottomopening, an inverted dished reflector having a bottom opening and beingmounted at least partially within said housing, an aperture in saidreflector, lamp holding means extending through the aperture in saidreflector for supporting one end thereof, a catch secured to saidhousing generally opposite said lamp holding means and having latchreceiving means, resilient latch spring means comprising an elongatespring member attached at one end to said reflector opposite saidaperture, the free end of said latch spring means having a latch tip forengaging said latch receiving means to support the other end of saidreflector in spaced relation from said housing and to exert an outwardlydirected biasing force thereon, a gasketed peripheral flange around thebottom opening of said reflector, a closure assembly hingedly mounted onsaid housing, releasable latch means for securing said closure assemblyto said housing in a closed position, said latch means including springmeans pivotally connected to one of said housing and said closureassembly, a latch member pivotally mounted to the free end of saidspring means, the other of said housing and said closure assembly havinga catch formed thereon, a catch surface formed on said latch member forcooperatively engaging said catch to prevent movement of said bottomclosure assembly away from said housing, a first cam surface formed onsaid latch member adjacent said catch surface, a second cam surfaceformed on the other of said housing and closure members adjacent saidcatch, rotation of said first cam surface onto said second cam surfaceafter the engagement of said catch surface on said catch being operativeto bring said bottom closure assembly into a closed position relative tosaid housing and to flex said elongate spring means, the refractorhaving a peripheral flange mounted in said closure assembly with saidflange engaging said gasketed reflector flange when the closure assemblyis in a closed position to move said reflector inwardly of said housingagainst the biasing force of said latch spring means so that saidreflector flange is biased toward engagement with said refractor flange.

9. In a luminaire including a housing having a bottom opening aninverted dished reflector having a bottom opening and being releasablymounted in said housing, refractor supporting means hingedly mounted tosaid housing and having a refractor receiving aperture, releasable latchmeans for securing said refractor supporting means in a closed positionrelative to said housing, a refractor having a peripheral flange oneside of which engages the aperture in said supporting means, saidrefractor flange being disposed adjacent the bottom opening of saidreflector when said support means is in its closed position, a firstholding means mounted on said bottom closure as sembly and engaging aportion of the other side of said refractor flange, a second holdingmeans disposed in said bottom closure assembly on the opposite side ofsaid aperture relative to said first holding means and including anelongate shaped spring member, said spring member having a pair ofdivergent portions engaging the opposite side of said refractor flange,lug means mounted on said closure assembly and adjacent said springmember, said spring member being movable laterally away from saidrefractor to move said divergent portions out of engagement with saidrefractor flange and into resilient engagement with said lug means sothat said spring member is held in its disengaged position.

10. In a luminaire including a housing having a 'bottom opening, aninverted dished reflector having a bottom opening and being releasablymounted in said housing, refractor supporting means hingedly mounted tosaid housing and having a refractor receiving aperture, releasable latchmeans for securing said refractor supporting means in a closed positionrelative to said housing, a refractor having a peripheral flange oneside of which engages the aperture in said supporting means, saidrefractor flange sealingly engaging said reflector flange when saidsupporting means is in its closed position, a first holding meansmounted on said refractor supporting means and engaging a port-ion ofthe other side of said refractor flange, a second holding means disposedon said refractor supporting means on the opposite side of said aperturerelative to said first holding means and including an elongate springmember, said spring member having a central portion and a pair ofdivergent portions engaging the opposite side f said refractor flange,lug means mounted on said closure assembly and adjacent the centralportion of said spring member when the divergent portions thereof are inengagement With said refractor flange, said spring member being movableaway from said refractor to move said divergent portions out ofengagement with said refractor flange and into resilient engagement withsaid lug means, so that said spring member is resiliently held in itsdisengaged position.

11. A luminaire comprising an inverted dished housing having a bottomopening, lamp holding means mounted in said housing for supporting alight source, an inverted dished reflector having a bottom opening, anaperture in one end of said reflector and slidably engaging said lampholding means, a catch secured to one of said housings and saidreflector generally opposite said lamp holding means, resilient means onthe other of said housing and said reflector to support said reflectorand bias the same outwardly of said housing, a gasketed peripheralflange around the bottom opening of said reflector, a closure assemblyhingedly mounted to said housing, a releasable latch means for securingsaid closure assembly to said housing in a closed position, said closureassembly having an aperture formed therein, a refractor having aperipheral flange one side of which supportingly engages the aperture insaid closure assembly, said refractor flange engaging said gasketedreflector flange when said closure assembly is in its closed position tomove said reflector inwardly of said housing in opposition to saidresilient means so that said flanges are biased toward sealingengagement, a first holding means mounted on said closure assembly andengaging a portion of the other side of said refractor flange, a secondholding means disposed in said bottom closure assembly on the oppositeside of said aperture relative to said first holding means and includingan elongate spring member, said spring member having a central portionand a pair of outwardly directed portions which engage the opposite sideof said refractor flange, lug means mounted on said closure assembly andadjacent the sides of the central portion of said spring member 10 whensaid outwardly directed portions are in engagement with said refractorflange, said spring member being movable away from said refractor tomove said outwardly directed portions out of engagement with saidrefractor flange and into resilient engagement with said lug means, sothat said spring member is held in its disengaged position.

References Cited by the Examiner UNITED STATES PATENTS 1,059,764 4/ 13Ringer 20-56.4 X 2,278,218 3/42 Ruggieri 24025 3,043,950 7/62 Keck 24O256,065,338 11/ 62 Husby et a1 240-25 3,065,339 11/62 Fahey 240-25 NORTONA-NSHER, Primary Examiner.

EVON C. 'BLUNK, Examiner.

1. A LUMINAIRE COMPRISING AN INVERTED DISHED HOUSING HAVING A BOTTOMOPENING, LAMP HOLDING MEANS MOUNTED IN SAID HOUSING FOR SUPPORTING ALIGHT SOURCE, AN INVERTED DISHED REFLECTOR HAVING A BOTTOM OPENING, ANAPERTURE IN ONE END OF SAID REFLECTOR AND SLIDABLY ENGAGING SAID LAMPHOLDING MEANS, RESILIENT SPRING LATCH MEANS FOR RELEASABLY SUPPORTINGTHE OTHER END OF SAID REFLECTOR IN SAID HOUSING, SAID RESILIENT SPRINGLATCH MEANS AND SAID LAMP HOLDING MEANS SUPPORTING SAID REFLECTOR INSPACED RELATION FROM SAID HOUSING, SAID SPRING LATCH MEANS ALSORESILIENTLY BIASING SAID REFLECTOR TOWARD LIMITED MOVEMENT OUTWARDLY OFSAID HOUSING, A PERIPHERAL FLANGE AROUND SAID BOTTOM OPENING OF SAIDREFLECTOR, A CLOSURE ASSEMBLY HINGEDLY MOUNTED ON SAID HOUSING,RELEASABLE LATCH MEANS FOR SECURING SAID CLOSURE MEMBER TO SAID HOUSINGIN A CLOSED POSITION, AND A REFRACTOR HAVING A PERIPHERAL FLANGE MOUNTEDIN SAID CLOSURE ASSEMBLY WITH SAID REFRACTOR FLANGE ENGAGING SAIDREFLECTOR FLANGE WHEN SAID CLOSURE ASSEMBLY IS IN ITS CLOSED POSITION,SAID ENGAGEMENT MOVING SAID REFLECTOR INWARDLY OF SAID HOUSING ANDAGAINST THE BIASING FORCE OF SAID SPRING LATCH MEANS SO THAT SAIDFLANGES ARE URGED INTO SEALING ENGAGEMENT AND MISALIGNMENT BETWEEN SAIDREFRACTOR AND SAID REFLECTOR IS CORRECTED.